markings
Markings are coloured lines, shapes, or patterns on the surface of something, which help to identify it.
A plane with Danish markings was over-flying his vessel.
一架带有丹麦标志的飞机正从他轮船的上空飞过。
The marking of a student's work is the act of deciding how good it is and writing a number or letter on it to indicate this opinion.
For the rest of the lunch break I do my marking.
在剩余的午休时间里,我批改作业。